A runner clears 6 hurdles in 10 seconds. If the time taken increases linearly with the number of hurdles, how long will it take to clear 12 hurdles?
Category: Math · Difficulty: hard
Hint: Use proportional reasoning.
Answer
20 seconds
Explanation
If 6 hurdles take 10 seconds, then 12 hurdles will take 20 seconds (10 seconds for 6 hurdles gives 20 seconds for 12).
This is a hard math riddle — a tricky one that takes a little thought. The answer is 20 seconds.
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